We see posts of where a guy is 33, 34 going out with a 21, 22 year old woman (he is seen as predatory, rapist etc..
But we do not see the same outrage when women that are 40s have flings, relationships with men that are in their early/mid twenties.
In fact we see sometimes in newspapers where older women see it as complimentary that they are able to get a guy that is 20 -25 years old younger than them to go out with them.